From 9cc7eb80ffac20cc5cfa90b80bcff2872f6c466b Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Tue, 9 May 2023 16:13:46 -0600
Subject: [PATCH] [hash] Speed-up int64 hash

---
 src/hb-algs.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hb-algs.hh b/src/hb-algs.hh
index 1dfa2d092..14a1ac55a 100644
--- a/src/hb-algs.hh
+++ b/src/hb-algs.hh
@@ -323,7 +323,7 @@ struct
 
   template <typename T,
 	    hb_enable_if (std::is_integral<T>::value && sizeof (T) > sizeof (uint32_t))> constexpr auto
-  impl (const T& v, hb_priority<1>) const HB_RETURN (uint32_t, (v * 8388607u) ^ ((v >> 32) * 8388607u) /* Mersenne prime */)
+  impl (const T& v, hb_priority<1>) const HB_RETURN (uint32_t, (v ^ (v >> 32)) * 8388607u /* Mersenne prime */)
 
   template <typename T> constexpr auto
   impl (const T& v, hb_priority<0>) const HB_RETURN (uint32_t, std::hash<hb_decay<decltype (hb_deref (v))>>{} (hb_deref (v)))